Control valve assembly

Patent metadata

Field	Value
Publication number	US-10865705-B1
Application number	US-201916551225-A
Country	US
Kind code	B1
Filing date	Aug 26, 2019
Priority date	Aug 26, 2019
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A control valve assembly for an engine system having a turbocharger system. The control valve is configured to control the position of a turbine actuator and a compressor actuator by directing hydraulic fluid into the proper passages. The control valve assembly includes a hydraulic powered bypass valve that, when energized, can reduce flow restriction of the hydraulic fluid, and can increase the speed of actuation of the turbine actuator.

First claim

What is claimed is:

1. A control valve assembly for an engine system having a turbine with a turbine valve, an engine control module, a hydraulic fluid reservoir, and hydraulic fluid, the engine control module operable to send turbo valve commands, the control valve assembly comprising:
a hydraulic fluid supply inlet;
a hydraulic fluid supply inlet passage in fluid communication with the hydraulic fluid supply inlet;
a control valve passage in fluid communication with the hydraulic fluid supply inlet passage;
a control valve partially positioned within the control valve passage;
a turbine closed passage in fluid communication with the control valve passage;
a compressor closed inlet in fluid communication with the turbine closed passage;
a compressor closed outlet;
a first hydraulic fluid drain passage in fluid communication with the compressor closed outlet;
a hydraulic fluid drain outlet in fluid communication with the first hydraulic fluid drain passage;
a second hydraulic fluid drain passage extending from the first hydraulic fluid drain passage to the turbine closed passage;
a turbine open passage in fluid communication with the control valve passage;
a bypass passage in fluid communication with the turbine open passage, the bypass passage extending from the turbine open passage towards the second hydraulic fluid drain passage; and
a bypass valve located between the bypass passage and the second hydraulic fluid drain passage.

2. The control valve assembly of claim 1 , wherein the control valve comprises an electro hydraulic control valve and the bypass valve comprises a spool valve.

3. The control valve assembly of claim 2 , wherein the control valve comprises a control valve piston shaped to be positioned within the control valve passage, the control valve operable to move the control valve piston along the control valve passage based on the turbo valve commands sent from the engine control module to switch a flow path of the hydraulic fluid between the turbine open passage and the turbine closed passage supplied by the control valve passage.

4. The control valve assembly of claim 2 , wherein the control valve is configured to increase opening speed of the turbine valve by directing a portion of the hydraulic fluid from the turbine closed passage through the second hydraulic fluid drain passage.

5. The control valve assembly of claim 1 , wherein a portion of the bypass valve is configured to actuate in response to a pressure level of the hydraulic fluid within the bypass passage and allow the second hydraulic fluid drain passage to be in fluid communication with the turbine closed passage.

6. The control valve assembly of claim 1 , wherein the bypass passage is configured to allow the second hydraulic fluid drain passage to be in fluid communication with the turbine closed passage based on a pressure of the hydraulic fluid in the turbine open passage.

7. A turbocharger system for an engine system having an engine control module and a hydraulic fluid reservoir containing hydraulic fluid, the turbocharger system comprising:
a control valve assembly having
a hydraulic fluid supply inlet configured to receive the hydraulic fluid from the hydraulic fluid reservoir;
a hydraulic fluid supply inlet passage in fluid communication with the hydraulic fluid supply inlet;
a control valve passage in fluid communication with the hydraulic fluid supply inlet passage;
a control valve partially positioned within the control valve passage, configured to move to direct hydraulic fluid out of the control valve passage in different directions;
a turbine closed passage in fluid communication with the control valve passage;
a compressor closed inlet in fluid communication with the turbine closed passage;
a compressor closed outlet;
a first hydraulic fluid drain passage in fluid communication with the compressor closed outlet;
a hydraulic fluid drain outlet in fluid communication with the first hydraulic fluid drain passage;
a second hydraulic fluid drain passage in fluid communication with the first hydraulic fluid drain passage, the second hydraulic fluid drain passage extending from the first hydraulic fluid drain passage to the turbine closed passage;
a turbine open passage in fluid communication with the control valve passage;
a bypass passage in fluid communication with the turbine open passage, the bypass passage extending from the turbine open passage towards the second hydraulic fluid drain passage; and
a bypass valve configured to provide fluid communication between the bypass passage and the second hydraulic fluid drain passage in response to a pressure of the hydraulic fluid reaching a predetermined level.

8. The turbocharger system of claim 7 , wherein the turbocharger system further comprises a turbine having a turbine valve and a turbine actuator, the turbine actuator in fluid communication with the control valve assembly and configured to open and close the turbine valve based on where the turbine actuator receives hydraulic fluid from the control valve assembly.

9. The turbocharger system of claim 8 , wherein the turbocharger system further comprises a compressor having a compressor valve and a compressor actuator, the compressor actuator in fluid communication with the control valve assembly and configured to close the compressor valve by receiving hydraulic fluid from the control valve assembly.

10. The turbocharger system of claim 7 , wherein the bypass valve is configured to be moved based on a pressure of the hydraulic fluid within the bypass passage and allow the second hydraulic fluid drain passage to be in fluid communication with the turbine closed passage.

11. The turbocharger system of claim 7 , wherein the control valve is operable to receive the turbo valve commands from the engine control module and change positions in response to a first turbo valve command to direct a flow of the hydraulic fluid from the control valve passage into the turbine open passage, and the control valve is operable to receive a second turbo valve command from the engine control module and change positions in response to the turbo valve commands to direct a flow of the hydraulic fluid from the control valve passage into the turbine closed passage.

12. The turbocharger system of claim 8 , wherein the control valve is configured to increase opening speed of the turbine valve by directing a portion of the hydraulic fluid from the turbine closed passage through the second hydraulic fluid drain passage.

13. The turbocharger system of claim 9 , wherein the compressor actuator is a one way actuator with an overcenter spring and the compressor valve is configured to opened based on vacuum pressure.

14. The turbocharger system of claim 8 , wherein the turbine valve is a butterfly valve and the compressor valve is a flapper valve.

15. The turbocharger system of claim 7 , wherein the control valve comprises an electro hydraulic control valve and the bypass valve comprises a spool valve.

16. A control valve assembly for an engine system having turbine with a turbine valve, an engine control module, a hydraulic fluid reservoir, and hydraulic fluid, the engine control module operable to send turbo valve commands, the control valve assembly comprising:
a hydraulic fluid supply inlet;
a hydraulic fluid supply inlet passage in fluid communication with the hydraulic fluid supply inlet;
a control valve passage in fluid communication with the hydraulic fluid supply inlet passage;
a turbine closed passage in fluid communication with the control valve passage;
a turbine open passage in fluid commu

Assignees

• Caterpillar Inc

Inventors

• Hittle Craig
• Schroeder Eric

Classifications

• F02B37/186

  Arrangements of actuators or linkage for bypass valves · CPC title

• F02B37/183 Primary

  Arrangements of bypass valves or actuators therefor · CPC title

• F02B37/162

  by bypassing, e.g. partially, intake air from pump inlet to pump outlet · CPC title

• F02B37/007

  with exhaust-driven pumps arranged in parallel {, e.g. at least one pump supplying alternatively} · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title